Visibility:
Controlling visiblity of layers on your page can be very useful. You can turn on and off visibility with Javascript from links for example, creating changes like you can make with Frames. Loading in new content by making it visible and other layers invisible.
To change visibility:
1. In the Layers Panel you will see an eyeball on the top left. To make layers visible leave them as they are or click to the left in the eye column until you see an open eye. To hide layers click to the left of the layer in the eyeball column and you should see a shut eye next to the layer. It is now hidden and will not load in until told to.